package com.sap.mall.cart.controller;

import com.sap.mall.cart.service.CartService;
import com.sap.mall.cart.vo.Cart;
import com.sap.mall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.concurrent.ExecutionException;
import java.util.List;

@Controller
public class CartController {

    @Autowired
    CartService cartService;

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> currentUserCartItems(){
        return cartService.getUserCartItems();
    }

    /**
     * 浏览器有一个cookie：user-key，标识用户身份，有一个月后过期
     * 如果第一次使用京东购物车功能，都会给一个临时用户身份；
     * 浏览器保存，每次访问都会带上这个cookie
     * <p>
     * 登录：session有
     * 未登录：按照cookie得user-key
     * 第一次：如果没有临时用户，帮忙创建一个临时用户
     *
     * @return
     */
    @GetMapping("cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);
        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);
        return "cartList";
    }

    /**
     * ra.addFlashAttribute():将数据放在session里面取出，只能去一次
     * ra.addAttribute("skuId",skuId);
     */
    @GetMapping("addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId, @RequestParam("num") Long num, RedirectAttributes ra) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId, num);
        ra.addAttribute("skuId", skuId);
        return "redirect:http://cart.mall.com/addToCartSuccess.html";
    }

    @GetMapping("addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        // 重定向到成功页面，再次查询购物车数据即可
        CartItem cartItem = cartService.getCartItem(skuId);
        model.addAttribute("item", cartItem);
        return "success";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("check") Integer check) {
        cartService.checkItem(skuId, check);
        return "redirect:http://cart.mall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,@RequestParam("num") Long num){
        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.mall.com/cart.html";

    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){
        cartService.deleteItem(skuId);
        return "redirect:http://cart.mall.com/cart.html";
    }
}
